unbound: Improper validation of wildcard synthesized NSEC records
Published Jan 23, 2018
5.4
MEDIUMCVSS 3.0
EPSS 2.63%
Description
A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.
Affected products
-
- Version before 1.6.8StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| NLnet Labs | Unbound | n/a |
|
Configuration 2
- 7.0
- 8.0
Configuration 3
- 14.04
- 16.04
- 17.10
- 18.04
No data.
Red Hat Enterprise Linux 6
unbound
Not affected
Red Hat Enterprise Linux 7
unbound
Will not fix
Red Hat Enterprise Linux 8
unbound
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | unbound | Not affected | n/a |
| Red Hat Enterprise Linux 7 | unbound | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | unbound | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of unbound as shipped with Red Hat Enterprise Linux 7. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.63% (0.02630) | 84.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.68% (0.02681) | 83.81th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.38% (0.00381) | 73.24th | v3 (v2023.03.01) |
| Apr 24, 2024 | 0.38% (0.00381) | 72.77th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.54% (0.00541) | 76.61th | v3 (v2023.03.01) |
| Aug 19, 2023 | 0.54% (0.00541) | 74.33th | v3 (v2023.03.01) |
| Jul 26, 2023 | 0.59% (0.00592) | 75.48th | v3 (v2023.03.01) |
| Jun 16, 2023 | 0.51% (0.00510) | 73.30th | v3 (v2023.03.01) |
| May 8, 2023 | 0.53% (0.00531) | 73.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.81% (0.00811) | 79.12th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v1 |
| Jan 6, 2022 | 1.25% (0.01247) | 29.93th | v1 |
| Sep 1, 2021 | 1.25% (0.01247) | 68.62th | v1 |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/102817 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-15105 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1507049 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-15105
- https://unbound.net/downloads/CVE-2017-15105.txt x_refsource_CONFIRMPatchVendor Advisory
- https://usn.ubuntu.com/3673-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-15105
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/102817 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-15105 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1507049 | Issue Tracking | |
| https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-15105 | ||
| https://unbound.net/downloads/CVE-2017-15105.txt | x_refsource_CONFIRMPatchVendor Advisory | |
| https://usn.ubuntu.com/3673-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-15105 |
Change history (0)
No recorded changes yet.